stm32f103+rawudp实验使用固件库代码

以下是使用STM32F103和Raw UDP协议进行通信的固件库代码示例：

#include "stm32f10x.h"
#include <string.h>
#include <stdio.h>

#define UDP_PORT 5555
#define UDP_BUFFER_SIZE 512

uint8_t udp_buffer[UDP_BUFFER_SIZE];

void RCC_Configuration(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
}

void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void USART_Configuration(void)
{
    USART_InitTypeDef USART_InitStructure;

    USART_InitStructure.USART_BaudRate = 115200;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Tx;
    USART_Init(USART2, &USART_InitStructure);
    USART_Cmd(USART2, ENABLE);
}

void TIM_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

    TIM_TimeBaseStructure.TIM_Period = 0xFFFF;
    TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1;
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

    TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);

    TIM_Cmd(TIM2, ENABLE);
}

void UDP_Send(uint8_t *data, uint16_t len)
{
    struct udp_pcb *pcb;
    ip_addr_t dest_ip;
    err_t err;

    pcb = udp_new();
    IP4_ADDR(&dest_ip, 192, 168, 1, 100);

    err = udp_connect(pcb, &dest_ip, UDP_PORT);
    if (err != ERR_OK)
    {
        printf("UDP connect failed, error code: %d\n", err);
        return;
    }

    err = udp_send(pcb, data, len);
    if (err != ERR_OK)
    {
        printf("UDP send failed, error code: %d\n", err);
    }

    udp_remove(pcb);
}

int main(void)
{
    RCC_Configuration();
    GPIO_Configuration();
    USART_Configuration();
    TIM_Configuration();

    printf("Start Raw UDP test\n");

    while (1)
    {
        // Wait for timer interrupt
    }
}

void TIM2_IRQHandler(void)
{
    uint16_t len = sprintf((char *)udp_buffer, "Hello, world!");

    UDP_Send(udp_buffer, len);

    TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
}

这个代码示例使用STM32F103芯片和LWIP库来实现Raw UDP协议通信。在主函数中，我们首先进行一些必要的硬件初始化，然后等待定时器中断。在定时器中断处理函数中，我们将数据发送到目标IP地址和端口。你可以根据你的具体需求修改代码。